CN211299197U - Two-air-chamber inflatable bed - Google Patents

Abstract

The utility model discloses a two air chambers air bed, including air pump, bed body air chamber and peripheral air chamber, the air bed is enclosed to close by top surface, bottom surface and side and forms, be equipped with the feed supplement four and close the piece between top surface and the side, be equipped with down the feed supplement four and close the piece between bottom surface and the side, between top surface, side and the last feed supplement four and close the piece, and enclose between bottom surface, side and the lower feed supplement four and close the piece and close and form peripheral air chamber, top surface, bottom surface, side, go up the feed supplement four and close between the piece and close down the formation bed body air chamber, the air pump is equipped with two and fills the disappointing device, and two fill the disappointing device autonomous working, and two fill the disappointing device and connect bed body air chamber and peripheral air chamber respectively, independently fill the disappointing to the air chamber. Through setting up the device that fills and loses heart of two independent works, independently fill and lose heart to peripheral air chamber and bed body air chamber, can control peripheral air chamber and the required quantity of gas of bed body air chamber better, it is required more to accord with people.

Description

Two-air-chamber inflatable bed

Technical Field

The utility model relates to a technical field of aerify the product, more specifically relates to a two air chambers air bed.

Background

At present, the existing inflatable bed on the market is not provided with a single independent peripheral air chamber generally, and only one air chamber forms the inflatable bed, so that the bed body is very unstable, people can easily topple over after sitting on the bed, and the inflatable bed tends to expand towards the middle, so that the conditions of uneven air pressure and force at the middle and the edge are easily caused, and the bed body is easy to slide off.

In addition, the prior art of the air bed generally arranges a drawstring in the plenum chamber to make the air bed form a certain shape in the air bed, so that the surface of the bed body is flat. The traditional stretching straps used by the inflatable mattress are all vertically connected with a surface sheet and a bottom sheet of the inflatable mattress, and after the inflatable mattress is inflated, the stretching straps can generate vertical tension on the surface sheet and the bottom sheet. However, the airbed having such a structure has the following disadvantages: firstly, the stress at the joint of the drawstring and the face sheet or the bottom sheet is concentrated, so that the joint of the drawstring and the face sheet or the bottom sheet is easy to break or the face sheet or the bottom sheet is easy to tear; secondly, the bed body is easy to partially collapse or incline upwards and is not stable enough, and the using effect and the service life are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at overcoming above-mentioned prior art's at least defect, provide one kind and establish simultaneously at bed body air chamber and side wall air chamber, and bed body air chamber and side wall air chamber two air chambers inflatable bed respectively have more stable beneficial effect.

The utility model discloses the technical scheme who takes is, a two air chambers air bed, including air pump, bed body air chamber and peripheral air chamber, the air bed is enclosed by top surface, bottom surface and side and closes and forms, be equipped with the feed supplement four and close the piece between top surface and the side, be equipped with down the feed supplement four between bottom surface and the side and close the piece, between top surface, side and the last feed supplement four and close the piece, and enclose between bottom surface, side and the lower feed supplement four and close the piece and close and form peripheral air chamber, top surface, bottom surface, side, go up the feed supplement four and close between the piece and close the formation bed body air chamber down, the air pump is equipped with two and fills the disappointing device, and two fill the disappointing device and independently work, and two fill disappointing devices and connect bed body air chamber and peripheral air chamber respectively, carry out independent filling and disappoint.

Among this technical scheme, enable more firm, harder all around of inflatable bed through setting up peripheral air chamber, the people lies the back of going, and peripheral air chamber can effectively prevent the people landing. Through setting up the device that fills and loses heart of two independent works, independently fill and lose heart to peripheral air chamber and bed body air chamber, can control peripheral air chamber and the required quantity of gas of bed body air chamber better, it is required more to accord with people.

In the prior art, when the edge of the inflatable bed is stressed, the bed body is easy to partially collapse and incline and is not stable enough due to the limited supporting strength of the side surface and the pull belt. In the technical scheme, the mattress body is enclosed to form a cuboid shape through the top surface, the side surfaces and the bottom surface, and the peripheral air chambers form the bed edge of the air bed, so that the support strength of the bed edge can be effectively improved. Wherein, the other positions that go to bed along being higher than the top surface can play interception and spacing effect, can effectively avoid the quilt landing, also can avoid the user to slide down from the mattress when sleeping. The setting of lower bed edge has increased the frictional force of mattress and bottom surface, makes the ground of grabbing of mattress body power bigger, grabs ground more steady, has played the antiskid effect and has improved the travelling comfort of using.

Furthermore, the air charging and discharging device connected with the peripheral air chamber is a peripheral air charging and discharging device, the peripheral air chamber is divided into an upper peripheral air chamber and a lower peripheral air chamber, and an air outlet of the peripheral air charging and discharging device is respectively communicated with the upper peripheral air chamber and the lower peripheral air chamber.

Furthermore, the upper peripheral air chamber is higher than other positions of the top surface, so that the functions of interception and limitation can be achieved, the quilt can be effectively prevented from falling off, and the user can be prevented from falling off the mattress during sleeping. The arrangement of the lower peripheral air chamber increases the friction force between the air bed and the bottom surface, so that the ground gripping force of the inflatable bed is larger and more stable, the anti-skidding effect is achieved, and the use comfort is improved.

Further, bi-pass device on the gas outlet of peripheral device of leaking and inflating, be equipped with two exports on the bi-pass device, two exports correspond and are equipped with two pipelines, and two pipelines are connected with last peripheral air chamber and lower peripheral air chamber respectively.

This technical scheme sets up two pipelines at the gas outlet of periphery gas filling and discharging device ingeniously to the realization is for peripheral gas chamber and lower peripheral gas chamber gas filling and discharging, need not to set up peripheral gas filling and discharging device in addition, has the beneficial effect of saving the cost.

The air inflation quantity of the upper peripheral air chamber and the lower peripheral air chamber can be controlled by the size of the space occupied by the pipeline, wherein the larger the space occupied by the air outlet is, the more the obtained air inflow is in the same time, and the hardness and softness values of the corresponding air chambers are larger.

Further, the device that fills and loses heart that is connected with bed body air chamber is the bed body device that fills and loses heart, the side at bed body air chamber is established to the air pump, bed body fills and loses heart the gas outlet of device and establishes in bed body air chamber.

This technical scheme, through the pipeline intercommunication between peripheral inflating and deflating device and the peripheral air chamber, and the bed body fills and deflates directly between device and the bed body air chamber and communicates to the realization is filled and deflated for different air chambers respectively on same air pump, has simple, convenient and cost-effective beneficial effect.

Furthermore, a drawstring is arranged in the bed body air chamber, and at least part of the drawstring is obliquely arranged in the bed body air chamber.

In this technical scheme, the top surface of mattress body corresponds the one side that the user tie was lain, and the bottom surface corresponds the one side with ground contact, and the stretching strap plays the effect of the bed body shape of the restraint mattress body formation platykurtic, but the stretching strap of perpendicular setting still can have the problem that mattress body top surface and periphery are bloated because the direction of stress is unanimous, forms the evagination of bread form promptly, leads to the aesthetic property of mattress to be relatively poor. The vertical lines at the top of the drawstring and the bottom of the drawstring are not on the same straight line, and the stress points of the top surface and the bottom surface are mutually spaced, so that the top surface and the bottom surface of the mattress body are better restrained, and the function of limiting the bulge of the top surface and the periphery of the mattress body can be realized. Simultaneously, can also make the atress of mattress body top surface and bottom surface more balanced, stability is better.

Furthermore, the drawstring is connected with the top surface and the bottom surface of the bed body air chamber respectively, and the included angle formed by the drawstring and the bottom surface gradually increases from the head and the tail of the bed body air chamber to the middle of the bed body air chamber and tends to a right angle.

Furthermore, the angle range of an included angle a formed between the pull belt and the bottom surface is 60-90 degrees.

Further, the flexibility of the top surface of the inflatable bed is greater than that of the bottom surface.

The larger the flexibility is, the lower the PVC soft hardness value is, the larger the expansion coefficient is, the larger the flexibility is, and the deformation is easier. The parameter PHR represents the part of rubber or resin added to each 100 parts (by mass) of PVC material, and indirectly represents the PVC hardness by indirectly adding the part of rubber or resin. Wherein, the PVC soft or hard of this technical scheme is 35 ~ 45PHR for the top surface, and the PVC soft or hard of bottom surface is 55 ~ 75 PHR. The flat and beautiful performance of the inflatable bed can be kept, the surface of the inflatable bed is prevented from forming bread-shaped bulges, and the inflatable bed can be better matched with the hardness and the flexibility of the bed body.

Further, the PVC softness and hardness of the top surface laminating layer is 40PHR, and the PVC softness and hardness of the bottom surface is 60-70 PHR.

Wherein, this technical scheme's air bed, the top surface of the bed body is formed by the laminating of flocking layer and PVC TPU layer, the bottom surface and the side of mattress body are formed by the laminating of bed course and PVC TPU layer, the flocking layer of top surface sets up the outside on PVC TPU layer, the bed course setting of bottom surface and side is in the outside on PVC TPU layer, and the mutual butt fusion of PVC TPU layer between top surface and side, bottom surface and the side forms the mattress structure.

The flocking layer is arranged on the top surface of the inflatable bed, so that noise generated by friction between a PVC material and a human body can be reduced, and the flocking layer is arranged on the top surface of the inflatable bed, so that the inflatable bed is more exquisite and breathable, brings more comfortable feeling to people when being in contact with the skin of the human body, and improves the use comfort. The cloth layer can reduce the noise generated when the inflatable bed is touched, avoid breakage and prolong the service life of the inflatable bed. In addition, after the inflatable bed in the prior art is inflated, the inflatable bed can expand towards the arc shape more, so that the mattress body is bread-shaped and protruded, the inflatable bed is not smooth enough and attractive enough, and the service life is influenced. The arrangement of the cloth layer limits the expansion of the PVC/TPU layer, so that the whole inflatable bed is stretched more smoothly and beautifully, the technical effect that the whole inflatable bed is not easy to deform is realized, the hardness of the inflatable bed is improved, the comfort of the inflatable bed is higher, and the service life is longer.

Furthermore, the cloth layer is made of nylon, terylene, polyester-cotton blended fabric, cotton cloth or sandwich mesh cloth.

Furthermore, the drawstring is in a sheet shape or a column shape or an annular structure, the sheet-shaped drawstring is arranged along the inner circumference of the mattress body, and the joint of the top surface/the bottom surface of the mattress body is in a bent shape or a linear design; the drawstrings in a columnar or annular structure are uniformly arranged in the space of the mattress body and are arranged in a matrix shape. The bed drawstring of the technical proposal is not limited to the above structural design, and can also be other design styles.

Furthermore, the upper feeding four-ply piece and the lower feeding four-ply piece are made of PVC/TPU materials, and PVC/TPU sheets are sequentially welded end to end or attached to form a rectangular shape.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the periphery of the inflatable bed is more stable and rigid by arranging the peripheral air chamber, and after a person lies on the inflatable bed, the peripheral air chamber can effectively prevent the person from sliding down. Through setting up the device that fills and loses heart of two independent works, independently fill and lose heart to peripheral air chamber and bed body air chamber, can control peripheral air chamber and the required quantity of gas of bed body air chamber better, it is required more to accord with people.

(2) According to the technical scheme, the drawstrings are obliquely arranged, so that stress points of the top surface and the bottom surface of the same drawstring are staggered, the stress of the top surface and the stress of the bottom surface are more balanced, the outward protruding degree of the mattress surface sheet and the peripheral surface is greatly reduced, and the mattress body is more attractive; simultaneously set up the stretching strap into to incline outward gradually from the top surface to the bottom surface to and from the center to outer inclination increase, make the mattress bottom surface grab ground more steady, guaranteed the steadiness and the roughness of mattress body.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the inflatable bed of the present invention.

Fig. 2 is a schematic view of the split structure of the air bed of the present invention.

Fig. 3 is a schematic cross-sectional structure view of the inflatable bed of the present invention.

Fig. 4 is an enlarged structural view of a portion of the air pump of fig. 3.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in figures 1, 2 and 3, a two-chamber air bed comprises an air pump 100, a bed air chamber 200 and a peripheral air chamber 300, the air bed is formed by enclosing a top surface 210, a bottom surface 220 and a side surface 230, an upper feeding four-closing sheet 240 is arranged between the top surface 210 and the side surface 230, a lower feeding forth four-in-one plate 250 is arranged between the bottom surface 220 and the side surface 230, and a lower feeding forth four-in-one plate 240 is arranged between the top surface 210, the side surface 230 and the upper feeding forth four-in-one plate 240, and the bottom surface 220, the side surface 230 and the lower supplementary material four-ply piece 250 are enclosed to form a peripheral air chamber 300, the top surface 210, the bottom surface 220, the side surface 230, the upper feeding four-close sheet 240 and the lower feeding four-close sheet 250 are enclosed to form a bed air chamber 200, the air pump 100 is provided with two inflation and deflation devices which work independently, and the two inflation and deflation devices are respectively connected with the bed body air chamber 200 and the peripheral air chamber 300 to independently inflate and deflate the bed body air chamber 200 and the peripheral air chamber 300.

Among this technical scheme, enable more firm, harder around of inflatable bed through setting up peripheral air chamber 300, the people lies the back of going, and peripheral air chamber 300 can effectively prevent the people landing. Through setting up the device that fills and loses heart of two independent works, carry out independent filling and losing heart to peripheral air chamber 300 and bed body air chamber 200, can control peripheral air chamber 300 and the required quantity of gas of bed body air chamber 200 better, more accord with people's needs.

In the prior art, when the edge of the air bed is stressed, the bed body is easy to partially collapse and incline and is not stable enough due to the limited supporting strength of the side surface 230 and the pull belt 260. In the technical scheme, the mattress body is enclosed by the top surface 210, the side surface 230 and the bottom surface 220 to form a cuboid shape, and the peripheral air chamber 300 forms the bed edge of the air bed, so that the support strength of the bed edge can be effectively improved. Wherein, the other positions of going to bed along being higher than top surface 210 can play interception and spacing effect, can effectively avoid the quilt landing, also can avoid the user to slide off from the mattress when sleeping. The arrangement of the lower bed edge increases the friction force between the mattress and the bottom surface 220, so that the grip of the mattress body is larger and more stable, the anti-skidding effect is achieved, and the use comfort is improved.

As shown in fig. 3, the inflation and deflation device connected to the peripheral air chamber 300 is a peripheral inflation and deflation device 101, the peripheral air chamber 300 is divided into an upper peripheral air chamber 300 and a lower peripheral air chamber 300, and the air outlet of the peripheral inflation and deflation device 101 is respectively communicated with the upper peripheral air chamber 300 and the lower peripheral air chamber 300.

The upper peripheral air chamber 300 is higher than the top surface 210 at other positions, so that the functions of interception and limitation can be achieved, the quilt can be effectively prevented from falling off, and the user can be prevented from falling off the mattress during sleeping. The arrangement of the lower peripheral air chamber 300 increases the friction force between the air bed and the bottom surface 220, so that the ground gripping force of the inflatable bed is larger and more stable, the anti-skid effect is achieved, and the use comfort is improved.

As shown in fig. 4, wherein, the two-way device 120 is arranged on the air outlet of the peripheral air inflation and deflation device 101, two outlets are arranged on the two-way device 120, two pipelines 130 are correspondingly arranged on the two outlets, and the two pipelines 130 are respectively connected with the upper peripheral air chamber 300 and the lower peripheral air chamber 300.

According to the technical scheme, the two pipelines 130 are ingeniously arranged at the air outlet of the peripheral air inflation and deflation device 101, so that the upper peripheral air chamber 300 and the lower peripheral air chamber 300 can be inflated and deflated without additionally arranging the peripheral air inflation and deflation device 101, and the beneficial effect of saving cost is achieved.

The air inflation amount of the upper peripheral air chamber 300 and the lower peripheral air chamber 300 can be controlled by the size of the air outlet space occupied by the pipeline 130, wherein the larger the air outlet space occupied by the pipeline 130 is, the more the obtained air inflow amount is in the same time, and the hardness and softness values of the corresponding air chambers are larger.

Wherein, the inflating and deflating device connected with the bed air chamber 200 is the bed inflating and deflating device 102, the air pump 100 is arranged on the side surface 230 of the bed air chamber 200, and the air outlet of the bed inflating and deflating device 102 is arranged in the bed air chamber 200.

This technical scheme, through pipeline 130 intercommunication between peripheral inflating and deflating device 101 and the peripheral air chamber 300, and direct intercommunication between bed body inflating and deflating device 102 and the bed body air chamber 200 to the realization is respectively for the gas chamber of difference on same air pump 100 and is inflated and deflated, has simple, convenient and cost-effective beneficial effect.

As shown in fig. 3, a drawstring 260 is provided in the bed air chamber 200, and the drawstring 260 is at least partially disposed in the bed air chamber 200 in an inclined manner.

In this technical scheme, the top surface 210 of mattress body corresponds the one side that the user lies flat, and the bottom surface 220 corresponds the one side with ground contact, and stretching strap 260 plays the effect of the flat bed body shape of the formation of the restraint mattress body, but perpendicular stretching strap 260 that sets up still can have the problem that mattress body top surface 210 and periphery are bloated because the direction of atress is unanimous, forms the evagination of bread form promptly, leads to the aesthetic property of mattress relatively poor. The drawstring 260 is more restrained by the top surface 210 and the bottom surface 220 of the mattress body because the vertical lines at the top of the drawstring 260 are not aligned with the vertical lines at the bottom of the drawstring 260 and the force points at the top surface 210 and the bottom surface 220 are spaced apart from each other, thereby serving to limit the bulge of the top surface 210 and the perimeter of the mattress body. Meanwhile, the stress on the top surface 210 and the bottom surface 220 of the mattress body is more balanced, and the stability is better.

The drawstrings 260 are respectively connected with the top surface 210 and the bottom surface 220 of the air chamber 200, and the included angle formed by the drawstrings 260 and the bottom surface 220 gradually increases from the head and tail sides of the air chamber 200 to the middle of the air chamber 200 and tends to be a right angle.

The included angle a formed between the pull strip 260 and the bottom surface 220 is 60-90 degrees.

Wherein the top surface 210 of the air bed has a greater flexibility than the bottom surface 220.

The larger the flexibility is, the lower the PVC soft hardness value is, the larger the expansion coefficient is, the larger the flexibility is, and the deformation is easier. The parameter PHR represents the part of rubber or resin added to each 100 parts (by mass) of PVC material, and indirectly represents the PVC hardness by indirectly adding the part of rubber or resin. Wherein, the PVC soft or hard of this technical scheme is 35 ~ 45PHR for top surface 210, and the PVC soft or hard of bottom surface 220 is 55 ~ 75 PHR. The flat and beautiful performance of the inflatable bed can be kept, the surface of the inflatable bed is prevented from forming bread-shaped bulges, and the inflatable bed can be better matched with the hardness and the flexibility of the bed body.

The PVC hardness of the top surface 210 laminating layer is 40PHR, and the PVC hardness of the bottom surface 220 is 60-70 PHR.

According to the technical scheme, the top surface 210 of the bed body is formed by attaching a flocking layer and a PVC/TPU layer, the bottom surface 220 and the side surface 230 of the mattress body are formed by attaching a fabric layer and a PVC/TPU layer, the flocking layer of the top surface 210 is arranged on the outer side of the PVC/TPU layer, the fabric layers of the bottom surface 220 and the side surface 230 are arranged on the outer side of the PVC/TPU layer, and the PVC/TPU layers between the top surface 210 and the side surface 230 and between the bottom surface 220 and the side surface 230 are mutually welded to form a mattress structure.

The flocking layer is arranged on the top surface 210 of the inflatable bed, so that noise generated by friction between a PVC material and a human body can be reduced, and the flocking layer is arranged on the top surface 210 of the inflatable bed, so that the inflatable bed is more exquisite and breathable, brings more comfortable feeling to people when being in contact with the skin of the human body, and improves the use comfort. The cloth layer can reduce the noise generated when the inflatable bed is touched, avoid breakage and prolong the service life of the inflatable bed. In addition, after the inflatable bed in the prior art is inflated, the inflatable bed can expand towards the arc shape more, so that the mattress body is bread-shaped and protruded, the inflatable bed is not smooth enough and attractive enough, and the service life is influenced. The arrangement of the cloth layer limits the expansion of the PVC/TPU layer, so that the whole inflatable bed is stretched more smoothly and beautifully, the technical effect that the whole inflatable bed is not easy to deform is realized, the hardness of the inflatable bed is improved, the comfort of the inflatable bed is higher, and the service life is longer.

Wherein, the bed of cloth is made by cotton or other materials.

The upper supplementary material four-ply piece 240 and the lower supplementary material four-ply piece 250 are made of PVC materials, and PVC sheets are sequentially welded end to end or attached to form a rectangular shape.

In this embodiment, the drawstring 260 is a sheet-shaped structure, the drawstring 260 is disposed along the inner circumference of the mattress body, and the joint between the top surface 210 and the bottom surface 220 of the mattress body is designed to be curved.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a two air chambers air bed, its characterized in that, includes air pump, bed body air chamber and peripheral air chamber, the air bed is enclosed to close by top surface, bottom surface and side and forms, be equipped with feed supplement four and close the piece between top surface and the side, be equipped with down feed supplement four and close the piece between bottom surface and the side, between top surface, side and the last feed supplement four and close the piece, and enclose between bottom surface, side and the lower feed supplement four and close the piece and form peripheral air chamber, top surface, bottom surface, side, go up feed supplement four and close the piece and enclose between the piece down and close formation bed body air chamber, the air pump is equipped with two and fills the disappointing device, and two fill the disappointing device autonomous working, and two fill the disappointing device and connect air chamber bed body and peripheral air chamber respectively, independently fill the disappointing to bed.

2. The two-air-chamber air bed as claimed in claim 1, wherein the air-inflating and-deflating device connected to the peripheral air chamber is a peripheral air-inflating and-deflating device, the peripheral air chamber is divided into an upper peripheral air chamber and a lower peripheral air chamber, and the air outlet of the peripheral air-inflating and-deflating device is respectively communicated with the upper peripheral air chamber and the lower peripheral air chamber.

3. The two-air-chamber air bed according to claim 2, wherein the two-way device is disposed on the air outlet of the peripheral air-filling and discharging device, the two-way device is provided with two outlets, two corresponding pipelines are disposed on the two outlets, and the two pipelines are respectively connected to the upper peripheral air chamber and the lower peripheral air chamber.

4. The two-air-chamber inflatable bed as claimed in claim 1, wherein the inflation and deflation device connected to the air chamber of the bed body is a bed body inflation and deflation device, the air pump is disposed at the side of the air chamber of the bed body, and the air outlet of the bed body inflation and deflation device is disposed in the bed body air chamber.

5. A two air chamber inflatable bed as claimed in claim 1, wherein a drawstring is provided in said bed air chamber, said drawstring being at least partially inclined within said bed air chamber.

6. A two air chamber air bed as claimed in claim 5, wherein said drawstrings are connected to the top and bottom surfaces of the air chamber of the bed respectively, and the included angle formed between said drawstrings and the bottom surface gradually increases from the head and tail sides of the air chamber of the bed to the middle of the air chamber of the bed, and tends to be more right-angled.

7. The two-air-chamber inflatable bed as claimed in claim 5 or 6, wherein the angle formed by the drawstring and the bottom surface of the air chamber of the bed body is 60-90 degrees.

8. A two chamber air bed as claimed in claim 1 or 5, wherein the top surface of the air bed is more flexible than the bottom surface.

9. The two-air-chamber inflatable bed as claimed in claim 5, wherein the drawstring is in a sheet or column or ring structure, is arranged along the inner circumference of the mattress body, and is in a curved or linear design at the junction of the top/bottom surface of the mattress body; the drawstrings in a columnar or annular structure are uniformly arranged in the space of the mattress body and are arranged in a matrix shape.

10. The two-chamber air bed as claimed in claim 1, wherein said upper and lower complementary four-ply sheets are made of PVC/TPU material and are formed by sequentially welding or laminating PVC/TPU sheets end to form a rectangular shape.

Images